Sealing head



Mar. 27, 1923.

1,449,701 H. H. SCHMIDT SEALING HEAD Filed Sept. 12, 1921 IO l4 3 Inventor: Henry H. Schmidt, bid

His fi tt orne g.

Patented Mar. 27, 1923-v 'rnrc COMPANY, A CORPORATION or YORK.

SEALING HEAD.

Application filed September 12, 1921. Serial No. 500,246.

T 0 of Z w ham it may concern:

Be it known that I, HENRY I-I. SCHMIDT, a citizen of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Sealing Heads, of which the following is a specification. 7

In actual practice a condition is met with wherein are found a plurality of adjacent pressure chambers or conduits formed in acommon casing by one or more partition Walls, the casing having an open end and the chambers containing fluids of different pressure, and it is desired toclose or seal said open end so as to cut off communication of adjacent chambers with the outside and with each other.

Such a condition is met with, for example, in connection with elastic fluid turbines wherein a side of the turbine casing may be provided with adjacent inlet openings leading to different stages of the machine, which openings it is desired to seal separately.

The object of my invention is to provide an improved sealing head for this purpose, and for a consideration of what I believeto be novel and my invention, attention is directed to the accompanying description and the claims appended thereto.

In the drawing, Fig. lis a sectional View of a structure embodying my invention, and Fig. 2 is a face view of a casing or conduit.

Referring to the drawing, 5 indicates a casing or conduit having an open end and divided into a plurality of chambers 6 and 7 by a wall 8. In the present instance casing or conduit 5 is shown as being round and as being provided with a flange 9 surrounding its open end. Chambers 6 and 7 are intended to contain or be subjected to pressures of different values. In this particular instance the pressure in chamber 6 is assumed to be greater than that in chamber 7.

According to my invention, I provide-a sealing head comprising two plates 10 and 11 fastened at their peripheries to flange 9 by bolts 12. The outer plate 10 is of such proportions that it is capable of withstanding the pressure of the higher pressure chamber, and to this end may be made of suitable material and dimensions. inner plate 11 need not be as strong as the The outer plate and is sufiiciently thin that it will yield or bend. slightly under the pressure to which it is subjected. Plates 10 and 11 are preferably separated slightly to pro vide a pressure space 13 between them and this pressure space is connected to the higher pressure chamber 6 through an open- HENRY H. SCHMIDT, or SCHENECTADY, nnwvonx, assrenonj'roennnnan ing 14. The periphery of inner plate ll'is clamped between the periphery of outer plate 10 and flange 9, and bolts 12 are drawn up tight to seal the joint. The end of parti-' tion wall 8 preferably lies flush with the surface of flange 9 so that plate 11 will engage it when made as a flat plate.

When the sealing head is bolted in position as shown in Fig. 1 inner plate 11 will be subjected on its inner surface to the pressure in chambers 6 and 7. On its outer surface it will be subjected to a pressure corresponding to the pressure in chamber .6. This means that the pressure on the outer surface of the part of platell over chamber 7 ex ceeds that on the inner surface by an amount corresponding to the difference in-pressure.

between chambers 6 and 7 and such pressure difference serves to force plate 11 hard against the end of partition wall 8 to provide a tight joint.

By the above described arrangement I provide a tight seal and one not likely to become loosened and to leak due to unequal I expansion and contraction of the parts.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

IVhat I claim as new and desire to secure by Letters Patent of the United States is l The combination with a casing having a partition dividing it into a plurality of pressure chambers and an open end, of a sealing head fixed over said open end, said sealing head comp-rising an inner plate and an outer plate, said inner plate having an sealing head comprising an inner plate and an outer plate, and means forming a conduit which connects the space between said plates to a chamber of higher pressure.

3. A sealing head comprising an inner plate and an outer plate which engage each other at their peripheries and are spaced at their central portions said inner plate being relatively flexible and being provided with an opening adapted to connect the 10 space between the plates to a pressure chamher.

In Witness whereof, I have hereunto set my hand this 9th day of September, 1921.

HENRY H. SCHMIDT. 

